Alloys of aluminium and process of producing the same



ANTON MANHAR'I', 0F VIENNA, AUSTRIA.

' ALLOYS 0F ALUMINIUM AND PROCESS OF IP RODUCING THE SAME.

No Drawing.

To an whom" it-may concern: Be it known that I, ANToN MANHART,

citizen of the Republic of Austria, and resident of Vienna, Clementinengasse 11, Austria, have invented certain new and useful Improvements in Alloys of Aluminium and Processes .of Producing the Same, of which the following is a specification.

Alloys of aluminium which contain copper, tin, antimony and magnesium besides aluminium are already known and a typical represe'ntative of this group has been described in the specification of Austrian Letters Patent No. 5842.

This Austrian patent describes an aluminum alloy made of the following:

I 100 parts of aluminum.

12.05 parts of tin.

0.20 parts of antimony. 0.09 parts of phosphorus. 7.50 parts of copper. 0.06 parts of magnesium. 0.06 parts of sodium carbonate or potash.

. 0.04 parts of sulphur.

The above preparations are by weight'and this alloyis made as follows v The tin, antimony, phosphorus, copper V. and magnesium are melted together and the aluminum is then added and brought-to a melting point.

melted and has been mixed, the potash and the sulphur are added and the mass is furv ther heated. p

This above described alloy, can be worked easily and is exceedingly resistant against acids and oxidizing agents but it softens and therefore cannot beemployed for cooking vessels. It is true, the hardness of the-alloy l can be increased by adding a greater quantity of copper and antimony but, as'is stated in the aforementioned patent, the brittle 'ness ofthe alloy is thus increased and this,

is undesirable.

' Accordingto my invention a part of the copper is substituted by manganese-copper to such extent that the amount of copper present in the alloy is doublethe amount of man anese-copper.

anganese copper in this specification means an alloy of copper and manganese V, which has been known for more than'fifty years and which can be manufactured by alloying the two metals by any approved and When the entire mass has Specification of Letters Eatent. jPatzgm flgedl July 111 1592 2 Application filed August 12, 1920. SerialNo. 403,156. i

well known method or by melting copper with ferro-manganese. I

The percentage of manganese in such an" alloy could be varied within Wide limits as 1s well known to the art, and my invention is not limited to any particular percentage of manganese as alloys containing. widely variable quantities of manganese'are suitscribed in Austrian atent No. 5842 in that aluminum is present in great excess in the alloy described in the said Austrian patent, while according to the present invention, the

' aluminum is only about 50% of the entire composition.

As clearing agent, preferably potash.

'(K CO is used.

Alloys of the best qualities have been obtained by using the following proportions:

Parts. Copper 2.500 Manganese-copper 1.250 Tin. 6.000 Antimony 0.1652 Magnesium 0.037 5 Potash 0.0375 Sulphur 0.0125 Aluminum A 10.000

Naturally I do not limit myself exactl to I these proportions as they may be varie to some extent according to the special purpose.

Alloys made according to my invention are not brittle. They are so hard that cooking vessels can be made out of them by casting as well as out of plates of the alloy.

I claim:

1. A hard, non-brittle, castable aluminum alloy having manganese, copper and tin as ingredients thereof, the amount of the aluminum present in the said alloy being in excess of the amount present of any other ingredient of the said alloy.

2. A hard, non-brittle, castable aluminum alloy having copper, manganese, tin, ant1- mony, and magnesium as ingredients thereof, substantially as and for the purposes described.

3. A hard, non-brittle, castable aluminum alloy made of copper, manganese, tin, antimony, magnesium and aluminum, the amount of aluminum being substantially the same as the total amount of the other ingredients, substantially as and for the purposes described. j I

4. A hard,.jnon-brittle, castable aluminum alleycomposed substantially of 10 parts of aluminum, .0375 parts of magnesium, .1652

parts of antimony, 6 parts of tin, 2.5 parts 10 of copper and less than 1.250 parts of manganese.

Signed at OfJuly, A. D. 1920.

ANTON MANHART.

Vienna, Austria, this 19th day 

